The steel tape is tightly wrapped around the cable core and often corrugated to maintain flexibility while enhancing compressive strength. It acts as a physical barrier that prevents deformation under heavy loads, such as those encountered during backfilling or vehicle traffic over. Direct Burial Cable is designed to be placed directly under the ground either by trenching or ploughing. These cables combine optical transmission efficiency with robust mechanical protection, making them ideal for outdoor, underground, and industrial installations. There are corrugated steel tape outside and an inner CSM around 12 loose tubes.